Today I have received the E-mail from Amazon.com (US) tittled "KDP Royalty Payment Notification - 内田 勲(E79NV) - 22132446".
So, I logged in to the site "https://kdp.amazon.com/self-publishing/reports)" and input my mail address and password because I have already my own account in KDP Japan site, but it was rejected. Then, at first, I tried to create another account with the same e-mail address and password as the one in Japan, in order to log in to my own account that already exits in KDP Japan site. But I noticed that I was on the way to create quite a new account, so I logged out immedeately to abort the account creation. So, what I ask you is to eraze may pending account in KDP US.
While, on the other hand, I would like to continue to keep my account in KDP Japan site.